Alt
Alt (alt.xyz) is an alternative-asset platform for high-value graded trading cards, founded by Leore Avidar, who previously co-founded the address and print API company Lob. Alt lets collectors and investors research, value, buy, sell, vault, and borrow against slabbed cards in one place, spanning baseball, basketball, football, hockey, soccer, golf, tennis, racing and combat-sports cards as well as Pokemon and other trading-card games. The platform combines a fixed-price marketplace, timed and "Liquid" auctions, an Instant Pricer, market-trend and research views, a physical vault in Delaware that removes sales tax from transactions, and card-backed lending. Its pricing engine, Alt Value, is a machine-learning model tuned by card-pricing specialists that produces a real-time value for every BGS, PSA and SGC card vaulted with Alt, and that value underwrites every trade, loan and product on the platform. Alt raised a $75M Series B in November 2021 led by Spearhead with Seven Seven Six and a group of professional athletes. Alt publishes no public developer program: there is no developer portal, API reference, OpenAPI definition, SDK, CLI, sandbox or self-service API signup. Its programmatic surface is the private backend behind the alt.xyz web and mobile applications (a FastAPI/GraphQL platform service, with the engineering organisation on GitHub as github.com/onlyalt), which integrates payment, identity-verification, authentication, lending-servicing and shipping vendors but is neither documented nor offered to third parties.
More than an index entry, but the surface is still mostly links rather than artifacts — the cohort most likely to move a full band from modest, well-targeted work.
API Evangelist profiles Alt the way a machine reads it — 1 machine-readable artifact, pulled from the provider's own public surface and indexed so a developer, an analyst, or an AI agent can evaluate it against every other provider on the network.
Every provider in the network is reduced to the same set of machine-readable artifacts — OpenAPI contracts, event specifications, GraphQL schemas, runnable collections, pricing and rate-limit signals, security posture, OAuth scopes, and the agent surfaces (MCP servers and skills) that let software drive the API on its own. We profile them because the interface is the part of a company you can actually inspect: it is a truer signal of what a provider does than any marketing page. From those artifacts we compute the Kin Score — Alt scores 18.4/100 (emerging), with a separate agent-readiness read of 4/100 (human only). The full breakdown is below, followed by every artifact we hold — each card links through to its machine-readable definition on apis.io.
Kin Score
This is the API Evangelist rating — a single, repeatable read computed from the artifacts on this page. Green fill is points earned; the red track is points possible, so every bar shows earned-versus-possible at a glance.
Kin Score
How this is scored →scored 2026-08-17 · rubric v0.11.0
Put this on your own site. The badge is drawn live from Alt's current Kin Score — paste it once and it updates itself every time the score is recomputed. It follows your visitor's light or dark setting, and it links back here so anyone who sees it can read the full breakdown.
<!-- Kin Score · API Evangelist -->
<a href="https://providers.apievangelist.com/providers/alt/"
title="Alt on API Evangelist — API profile and Kin Score">
<img src="https://apis.io/badge/alt.svg"
alt="Alt Kin Score — API readiness rating by API Evangelist" width="150" height="150" loading="lazy">
</a>[](https://providers.apievangelist.com/providers/alt/)<!-- Kin Score · API Evangelist -->
<a href="https://providers.apievangelist.com/providers/alt/"
title="Alt on API Evangelist — API profile and Kin Score">
<img src="https://apis.io/badge/alt/card.svg"
alt="Alt Kin Score — API readiness rating by API Evangelist" width="340" height="120" loading="lazy">
</a>More shapes, themes and sizes → · Score as JSON · How badges work
How we profile Alt
Each block below is one kind of artifact we hold for Alt. For each we say what it is and why it earns a place in the profile, then list every one we've indexed — capped at two rows, scroll within the panel for the rest.
Security Posture 1
Authentication, domain security, vulnerability disclosure, and trust-center signals — the evidence that a provider takes security seriously enough to document it. We profile it because you can't govern what you can't see.
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Resources
Every other property we hold for Alt — documentation, portals, status pages, policies, and corporate surface — grouped by the job it does, following the integrator's arc from getting started to running in production.
Get Started 2
Portal, sign-up, and the first successful call
Agent Surfaces 1
MCP servers, agent skills, and machine-readable catalogs
Build 1
SDKs, sample code, and the tooling you integrate with
Access & Security 1
Authentication, authorization, and security posture
Operate 1
Status, limits, changes, and where to get help
Commercial 3
Pricing, plans, and the legal terms of use
Company 6
The organization behind the API
Other 1
Properties that don't map to a standard resource type
← All providers · Data indexed from github.com/api-evangelist/alt · machine-readable index on apis.io
This is an independent, third-party profile of Alt, published by API Evangelist. We do not operate, host, resell, or support these APIs, and we are not affiliated with or endorsed by the company unless stated above. Everything here is built from publicly available information — the company's own site, developer portal, documentation, public repositories, and the specifications it publishes for public use. Nothing is obtained by breaching a system, defeating an access control, or using credentials.
The Kin Score and Agent Readiness rating are independently calculated assessments of a company's public API artifacts, scored against a published rubric. They are not certifications, endorsements, security assessments, or audits.
Corrections, re-scores, and removal are free — no partnership or purchase required, and you do not need to justify the request. A removed company is recorded as unrated, never scored zero for having asked. Acknowledgement within one business day; removal within two.
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you will get a person, not a form — we will tell you exactly which public URLs this profile was built from.